#ifndef TRIGONOMETRY_H
#define TRIGONOMETRY_H

#include <math.h>

// 函数声明
int int2(double v);
double mod2(double v, double n);
double sqrt(double x);
double floor(double x);
double abs(double x);
double sin(double x);
double cos(double x);
double tan(double x);
double asin(double x);
double acos(double x);
double atan(double x);
double atan2(double y, double x);

#endif // TRIGONOMETRY_H